(19)
(11) EP 0 896 437 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
06.02.2002 Bulletin 2002/06

(43) Date of publication A2:
10.02.1999 Bulletin 1999/06

(21) Application number: 98114642.6

(22) Date of filing: 04.08.1998
(51) International Patent Classification (IPC)7: H04B 1/707
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 04.08.1997 JP 20909197

(71) Applicant: KABUSHIKI KAISHA TOSHIBA
Kawasaki-shi, Kanagawa 212-8572 (JP)

(72) Inventors:
  • Naruse, Akiko
    1-1 Shibaura 1-chome,Minato-ku Tokyo 105 (JP)
  • Obayashi, Arata
    1-1 Shibaura 1-chome,Minato-ku Tokyo 105 (JP)
  • Nakamura, Ken
    1-1 Shibaura 1-chome,Minato-ku Tokyo 105 (JP)

(74) Representative: Henkel, Feiler, Hänzel 
Möhlstrasse 37
81675 München
81675 München (DE)

   


(54) Spread spectrum synchronization apparatus


(57) A present invention provides a spread spectrum communication apparatus that acquisition of synchronization of the pilot signal can be conducted in a short time with a high probability when a mobile station stays in the same radio area or in its vicinity. The spread spectrum communication apparatus includes a PN period holding counter (234) is provided in a search receiver (23), and phase information of the PN code is held in the counter (234) during the power off interval. At the time of operation of synchronization acquisition of a pilot signal conducted when power is turned on again, the operation of synchronization acquisition of the pilot signal is conducted with a preset search width around the phase derived on the basis of the above described held phase information.






Search report